Question

我有一些问题引用了一些动态变量，这些变量等同于基于用户会话位置值的某些mongoose模型。我有两个脚本。

location.js＆amp; reporting.js

location.js

module.exports = function(req) {
// Setting some variables to do the following.
// Assign var to value of the client remote address. This should return the ip address.
// The remoteAddress object returns an IPV6 format. Because of this, I setup a new var to the value of the client IP stripped of the ":::ffff" portion.
// I then split the string by the period character to get an array of the sections of string.

var clientIP = req.connection.remoteAddress;
var strippedIP = clientIP.replace(/^.*:/, '');
var splitIP = clientIP.split('.')

// Determining if the site session value based on second octet of ip response.
  if (splitIP[1] == '28') {
    req.session.site = 'shk';
  }
  else if (splitIP[1] == '29') {
    req.session.site = 'ftm';
  }
  else if (splitIP[1] == '31') {
    req.session.site = 'tpe';
  }
  else {
    req.session.site = 'ftm';
  }

// Using case statement to determine the machinery model to use as well as passdowns.

switch(req.session.site) {
  // Shakopee Variables
  case 'shk':
    console.log("You're located in Shakopee.");

    var Machinery = require('../models/machinery_shk');
    var Loggings = require('../models/passdowns_shk');

    break;
  // Fort Mill Variables
  case 'ftm':
    console.log("You're located in Fort Mill.");

    var Machinery = require('../models/machinery_ftm');
    var Loggings = require('../models/passdowns_ftm');

    break;
  // Tempe Variables
  case 'tpe':
    console.log("You're located in Tempe.");

    var Machinery = require('../models/machinery_tpe');
    var Loggings = require('../models/passdowns_tpe');

    break;
  // Default values to use if no case is matched.
  default:
    console.log("You're located in Default");

    var Machinery = require('../models/machinery_ftm');
    var Loggings = require('../models/passdowns_ftm');

    break;
}
};

reporting.js - route

  reportingRouter.route('/')

    .get((req, res, next) => {
      Location(req);

        if (req.session.loggedIn === false || req.session.loggedIn === undefined || !req.session.loggedIn) {
          res.redirect('/reporting/login')
        }
        else if (req.session.loggedIn === true) {

        Loggings.find({}, (err, loggings) => {
          if (err) {
            throw err;
          }
          else {
            Machinery.find({}, (err, machinery) => {
              if (err) {
                throw err;
              }
              else {
                // console.log(machinery)
                Shifts.find({}, (err, shifts) => {
                  if (err) {
                    throw err;
                  }
                  else {
                    res.render('reporting', { pageTitle: 'Reporting', loggings: loggings, machinery: machinery, shifts: shifts, ldapFullName: req.session.fullName })
                    // console.log(loggings)
                  }
                })
              }
            })
          }
        })
      }
    })

location.js设置为公开一个带一个参数的函数。该参数是快速"req"对象。此脚本还采用客户端IP地址。我接受客户端IP并得到字符串的第二个八位字节。

基于该值，我在快速会话中的session对象的req对象中分配了一个属性。

req.session.site = <some-value>

设置完成后，我会对分配的值执行切换操作。如果有一些值，请为某些mongoose模型分配更多变量。例如，我为某个猫鼬模型设置了"Loggings"变量。

var Loggings = require('../models/passdown_<site-id>')

假设分配了这些变量，我应该能够在report.js脚本中"require"这个脚本。

在reporting.js中，我为该模块分配了一个变量。

var Location = require('location')

然后，我调用该变量并在某些路径上传入req参数。例如，当在某个路由上执行"GET"时，我将此Location模块“函数”称为传递req对象。

Location(req)

现在，假设所有这些都有效，我是否应该能够执行引用我在location.js中设置的"Loggings"变量的mongoose查询？我得到了一些undefined，我相信这是由于范围问题的变化。在这种情况下，我应该"export"这些模型需要吗？例如，

exports.Loggings = require('../models/passdown_<site-id>')

为此我的无知道歉。

Answer 1

没关系。我决定将位置检查逻辑放到app.js下的函数中。确定位置变量后，在函数末尾添加next()方法。这样，在函数运行后，它将进入任何等待的路径。

然后我告诉app使用这个中间件功能。

app.use(checkLocation);

这适合我和应用程序需要。可能不是最好的解决方案，但我让它使用它。如果有人有任何其他意见，我会对此持开放态度。

NodeJS引用导出模块

1 个答案: